Grapes

Event

Advances in Vineyard Water & Nutrient Management Workshop

May 1 2025

The workshop will feature presentations by various experts and researchers focusing on best irrigation and nutrient management practices of vineyards in the San Joaquin Valley. Attendees will gain insights into the irrigation and nutrient needs of vineyards. This knowledge aims to ensure healthier vine…
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Grapes

When to plant: February–March Harvest window: July–October, depending on variety Fertilization: Light (if any) nitrogen in the spring; monitor for possible zinc and potassium needs Prune in dormant season, using the pruning system (cane or spur pruning) based on grape variety.
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Grape Pests & Diseases

The University of California has an extensive Integrated Pest Management (IPM) website with a comprehensive section for grapes, including a year-round IPM program and guidelines. The UC IPM guidelines are an excellent source of information on managing pests.
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Weed Control in Vineyards

Weed control in vineyards enhances the establishment of newly planted vines and improves the growth and yield of established vines.
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Threecornered alfalfa hopper degree day model

The threecornered alfalfa hopper (TCAH) is a vector of Grapevine red blotch virus that causes Grapevine red blotch disease in vineyards. A degree day model was developed to predict the ideal time frame for ground cover management to help reduce TCAH populations in vineyards.
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